Justification:L. polylepis is only found in one location, Stanicka Jaruga, a stream 1 m wide and 2 km long (area of occupancy (AOO) <10 km² and extent of occurrence (EOO) <100 km²). There is also a continuing decline of AOO, habitat quality and mature individuals due to water extraction and introduced trout species.

It is only found at a very small karstic stream, Stanicka Jaruga in Croatia (Cikola River). There are historical records from Zagorska Dreznica, Dobra and Mreznica drainages (not confirmed) (M. Mrakovcic pers. comm.).